2divided by 11 times 9 minus 3 squared

Umm.. just started this 2day and its not on my notes(p′︵‵。)

Shiny white dental insurance costs $258 per year. approximately one-third of insured people need a filling, which averages $110 each. 80% of insured people get a preventive check-up each year, and the average cost of this visit is $95. if you consider shiny white’s income and expenses, what is the expected value of each insured customer?

49xy +34y - 72z. determine the degree of the polynomial